Struct Kind

pub struct Kind(/* private fields */);

Available on crate feature wayland and Linux only.

bitmask of flags in presented event

These flags provide information about how the presentation of the related content update was done. The intent is to help clients assess the reliability of the feedback and the visual quality with respect to possible tearing and timings.

Implementations

impl Kind

pub const Vsync: Kind

presentation was vsync’d

The presentation was synchronized to the “vertical retrace” by the display hardware such that tearing does not happen. Relying on software scheduling is not acceptable for this flag. If presentation is done by a copy to the active frontbuffer, then it must guarantee that tearing cannot happen.

pub const HwClock: Kind

hardware provided the presentation timestamp

The display hardware provided measurements that the hardware driver converted into a presentation timestamp. Sampling a clock in software is not acceptable for this flag.

pub const HwCompletion: Kind

hardware signalled the start of the presentation

The display hardware signalled that it started using the new image content. The opposite of this is e.g. a timer being used to guess when the display hardware has switched to the new image content.

pub const ZeroCopy: Kind

presentation was done zero-copy

The presentation of this update was done zero-copy. This means the buffer from the client was given to display hardware as is, without copying it. Compositing with OpenGL counts as copying, even if textured directly from the client buffer. Possible zero-copy cases include direct scanout of a fullscreen surface and a surface on a hardware overlay.

impl Kind

pub const fn empty() -> Kind

Get a flags value with all bits unset.

pub const fn all() -> Kind

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u32) -> Option<Kind>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u32) -> Kind

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> Kind

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<Kind>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in self are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: Kind) -> bool

Whether any set bits in other are also set in self.

pub const fn contains(&self, other: Kind) -> bool

Whether all set bits in other are also set in self.

pub fn insert(&mut self, other: Kind)

The bitwise or (|) of the bits in self and other.

pub fn remove(&mut self, other: Kind)

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: Kind)

The bitwise exclusive-or (^) of the bits in self and other.

pub fn set(&mut self, other: Kind, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: Kind) -> Kind

The bitwise and (&) of the bits in self and other.

pub const fn union(self, other: Kind) -> Kind

The bitwise or (|) of the bits in self and other.

pub const fn difference(self, other: Kind) -> Kind

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: Kind) -> Kind

The bitwise exclusive-or (^) of the bits in self and other.

pub const fn complement(self) -> Kind

The bitwise negation (!) of the bits in self, truncating the result.

impl Kind

pub const fn iter(&self) -> Iter<Kind>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<Kind>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations

impl Binary for Kind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl BitAnd for Kind

fn bitand(self, other: Kind) -> Kind

The bitwise and (&) of the bits in self and other.

type Output = Kind

The resulting type after applying the & operator.

impl BitAndAssign for Kind

fn bitand_assign(&mut self, other: Kind)

The bitwise and (&) of the bits in self and other.

impl BitOr for Kind

fn bitor(self, other: Kind) -> Kind

The bitwise or (|) of the bits in self and other.

type Output = Kind

The resulting type after applying the | operator.

impl BitOrAssign for Kind

fn bitor_assign(&mut self, other: Kind)

The bitwise or (|) of the bits in self and other.

impl BitXor for Kind

fn bitxor(self, other: Kind) -> Kind

The bitwise exclusive-or (^) of the bits in self and other.

type Output = Kind

The resulting type after applying the ^ operator.

impl BitXorAssign for Kind

fn bitxor_assign(&mut self, other: Kind)

The bitwise exclusive-or (^) of the bits in self and other.

impl Clone for Kind

fn clone(&self) -> Kind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Kind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Extend<Kind> for Kind

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = Kind>,

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for Kind

const FLAGS: &'static [Flag<Kind>]

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> Kind

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn known_bits(&self) -> Self::Bits

Get the known bits from a flags value.

fn unknown_bits(&self) -> Self::Bits

Get the unknown bits from a flags value.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn iter_defined_names() -> IterDefinedNames<Self>

Yield a set of all named flags defined by [Self::FLAGS].

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in other are also set in self.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in other are also set in self.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in self and other.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of self with the complement of other (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in self and other.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call [Flags::insert] when value is true or [Flags::remove] when value is false.

fn clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in self and other.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in self and other.

fn difference(self, other: Self) -> Self

The intersection of self with the complement of other (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in self and other.

fn complement(self) -> Self

The bitwise negation (!) of the bits in self, truncating the result.

impl FromIterator<Kind> for Kind

fn from_iter<T>(iterator: T) -> Kind

where T: IntoIterator<Item = Kind>,

The bitwise or (|) of the bits in each flags value.

impl Hash for Kind

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoIterator for Kind

type Item = Kind

The type of the elements being iterated over.

type IntoIter = Iter<Kind>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <Kind as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for Kind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Not for Kind

fn not(self) -> Kind

The bitwise negation (!) of the bits in self, truncating the result.

type Output = Kind

The resulting type after applying the ! operator.

impl Octal for Kind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for Kind

fn eq(&self, other: &Kind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Sub for Kind

fn sub(self, other: Kind) -> Kind

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = Kind

The resulting type after applying the - operator.

impl SubAssign for Kind

fn sub_assign(&mut self, other: Kind)

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl TryFrom<u32> for Kind

type Error = ()

The type returned in the event of a conversion error.

fn try_from(val: u32) -> Result<Kind, ()>

Performs the conversion.

impl UpperHex for Kind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for Kind

impl Eq for Kind

impl StructuralPartialEq for Kind